Charge My E-Bike
52V Battery 4-Pins / 5-Pins 48V 36V
52V Battery 4-Pins / 5-Pins 48V 36V
Couldn't load pickup availability
Aleaivy Hailong Downtube Lithium-Ion E-Bike Battery Pack (36V / 48V / 52V
Up to 20Ah) – Heavy-Duty Power Solution for Bafang BBS02, BBS03, BBSHD Mid-Drive & Hub Motors
Power your drive system with the Aleaivy Hailong Downtube Lithium-Ion E-Bike Battery Pack. Engineered specifically for high-torque mid-drive conversions (such as the Bafang BBS02, BBS03, and BBSHD series) as well as heavy-duty hub motor builds, this Hailong case provides exceptional weight distribution, IP65 weather resistance, and long-range reliability.
Built using high-density 18650 / 21700 lithium-ion cells and safeguarded by an integrated Smart Battery Management System (BMS), this battery delivers clean, surge-resistant power across steep inclines and high-speed commutes. Customize your build with your choice of 36V, 48V, or 52V nominal outputs and either 4-Pin or 5-Pin base rail interface connections.
⚠️ Base Rail Selection Advisory (4-Pin vs. 5-Pin)
PLEASE SELECT THE CORRECT BASE INTERFACE:
4-Pin Base: Features 4 discharge blade connectors on the mounting rail (standard for standard controller interfaces).
5-Pin Base: Features 5 discharge blade connectors on the mounting rail (recommended for high-amp setups and select controller protocols).
Please inspect your current motor power lead or mounting plate to ensure you select the matching 4-Pin or 5-Pin base rail option during checkout.
🚴 Broad Motor & Kit Compatibility
-
Bafang Mid-Drive Systems: Fully compatible with Bafang BBS01 (36V/48V 250W–500W), BBS02 (48V/52V 500W–750W), BBS03 / BBSHD (48V/52V 1000W+).
-
Direct Drive & Geared Hub Motors: Fits 250W, 500W, 750W, 1000W, and 1500W direct-drive and geared hub motor conversion kits.
🚀 Key High-Performance Features
-
Universal Hailong Frame Integration: Mounts directly to standard water bottle cage threaded bosses on your downtube for a low center of gravity and balanced handling.
-
IP65 Weatherproof Casing: Sealed high-impact housing shields internal battery cells and electronics from heavy rain, road splash, and trail dust.
-
Multiple Capacity Options (10Ah / 15Ah / 20Ah): Match your exact commute range requirements with energy outputs spanning 360Wh up to 1040Wh.
-
Integrated Smart BMS: Protects your investment against overcharging, over-discharging, overcurrent, thermal runaway, and short circuits.
-
Anti-Theft Key Lock & On-Pack LED Indicator: Features an integrated lock to secure the pack to your frame base rail, along with a push-button LED charge level gauge.
📊 Technical Specifications Matrix
| Specification Parameter | Aleaivy Hailong Battery Specifications |
| Brand Designation | Aleaivy |
| Casing Style | Hailong 1 / Hailong Downtube Style |
| Base Rail Interface | 4-PIN or 5-PIN Base Rail (Optional) |
| Nominal Voltage Options | 36V / 48V / 52V |
| Capacity Options | 10Ah / 15Ah / 20Ah |
| Total Energy Output | 360Wh / 480Wh / 540Wh / 720Wh / 960Wh / 1040Wh |
| Cell Format | Premium 18650 / 21700 High-Density Lithium-Ion |
| Weatherproof Rating | IP65 Waterproof / Dustproof |
| Safety Certifications | CE, UL Certified |
| Item Weight Range | Approx. 3.75 kg – 5.8 kg (8.2 lbs – 12.8 lbs depending on capacity) |
| Warranty Protection | 2-Year Manufacturer Warranty |
| Hazardous Chemical Registry | High-concerned chemical: None |
Installation & Operation Guidelines
-
Mounting the Base Rail: Fasten the 4-Pin or 5-Pin base plate to your bike frame's water bottle cage bosses using stainless steel M5 bolts.
-
Connecting to Controller: Connect the discharge cable extending from the base plate directly to your Bafang motor harness or external motor controller using matching connectors.
-
Locking & Removal: Align the Hailong pack with the base rail track, slide downward until fully seated, and turn the key to the locked position to lock the pack in place.
📦 Package Contents
-
1 x Aleaivy Hailong Lithium-Ion Battery Pack (Choice of Voltage/Capacity)
-
1 x 4-Pin or 5-Pin Downtube Base Mounting Rail
-
2 x Anti-Theft Safety Keys
-
1 x Discharge Extension Cable

*Equipped with the Top 18650 Cells & USB Port, for a 3- 5 Year life span; the battery case has a waterproof function.
*Built-in BMS for Using Security & 1,200 times Recharge-Cycle.
*The electric bike battery pack has 4-PINS/5-PINS(optional) battery base with a discharge cable and will fit most bike frames.

Please note before purchase:
1. What is the voltage of your bicycle? If it's 36V, buy a 36V battery. If it's 48V, buy a 48V battery. You can also tell the voltage of the battery
you need from your original battery or the control center. 10Ah,15Ah,20Ah, and 30Ah represent the battery capacity and indicate the range
2. Is the size of the battery suitable for fitting into your bicycle frame
3. The interface between the battery and the base needs to be determined. We have two types of interfaces: 4-pin and 5-pin. If your original
battery base is 4-pin and you don't want to replace the base, you can purchase a 4-pin battery set. If it's a 5-pin battery base, buy a 5-pin
battery because our battery set includes the base.
Of course, if you don't mind replacing the original battery base, you don't need to worry about whether the battery base is 4-pin or 5-pin,
because our batteries come with battery bases
4. When charging, please connect the power supply first and then the battery
5. Do not use up all the battery power completely. The battery should be charged each time with some remaining power
6. When you receive a new battery, make sure to charge it before using it.
About this item:
【Solid & Waterproof】This battery shell is made of a water-resistant and firm ABS plastic casing, ensure protect the inside cells from damages for fallen or crashes. Meanwhile, it has IP65 waterproof coverage sealing to avoid water and moisture damage, so it can be used throughout the day, whether it is rain or mud.
【Advanced Battery Management System】This e-bike battery has a design with a smart battery management system, referred to as BMS. The BMS has to undertake more accurate calculations of electricity to ensure the service life of the ebike battery and can also protect the bike battery from damage due to short-circuit, over-current, over-charge, and over-discharge, providing safety while the electric bike battery is running.
【Safe Lock】Anti-theft function.LED power Indicator: Real-time battery level detection, reminds you to charge the battery. Power Switch: Reduces battery power loss.USB Port: Can charge your phone.30A BMS: Can effectively protect the battery and make it safer. Waterproof case: Reduces the possibility of damaging the internal battery.Anti-vibration Pads: It has already been adhered to the battery base.Stronger and less vibration! Product with 4-pin battery base/5pin battery base, easy to install. Discharge wire with yellow wax tube, which is waterproof, anti-electric, and high-temperature resistant!
【 ≥80% Capacity After 800 Cycles】Our electric bicycle battery uses automotive-grade A cells; every e-bike battery has passed the QC appearance and function test before shipment. The ebike battery charge cycle exceeds 1000 times, with≥80% capacity after 800 cycles.
【Precautions】After installing the electric bike battery according to the instruction manual, please fully charge the lithium battery before use. Please turn on the switch when you recharge so that the battery can be recharged to 100%.
Please confirm the motor and voltage of your ebike before purchase and check whether the size of the battery can be placed in your bike's frame, and finally choose the battery that fits your bike.
Charging note: Please connect the charger to the power supply first, and then connect the charger to the battery
Package List (According to your choice)
* 1 x Lithium Ion (Li-Ion) Battery
* 1 x Female XT60 Connector
* 1 x Male XT60 Connector
* 1 x BMS
* 1 x Lithium-Ion (Li-Ion) Battery Charger
* 3 x Screws(One spare)
* 2 x Keys
|
Nominal Voltage |
36V 10Ah |
36V 15Ah |
36V 20Ah |
48V 10Ah |
|
Base In Plug |
4-PINS |
4-PINS |
4-PINS |
4-PINS |
|
For motor |
36V 0~1000w |
36V 0~1500w |
36V 0~1500w |
48V 0~1500w |
|
Watt Hours |
360Wh(Power:30-40KM) |
540Wh(Power:45-60KM) |
720Wh(Power:50-80KM) |
480Wh(Power:45-50KM) |
|
Cell |
A-grade 18650 |
A-grade 18650 |
A-grade 18650 |
A-grade 18650 |
|
Weight |
3.75 kg(8.27lbs) |
4.9 kg(10.8lbs) |
5.5 kg(12.13lbs) |
4.4 kg(9.7lbs) |
|
With Charger |
42V2A |
42V2A |
42V 2A |
54.6V 2A |
|
Discharge Connector |
XT60 |
XT60 |
XT60 |
XT60 |
|
BMS |
30A(BMS) |
40A(BMS) |
40A(BMS) |
30A(BMS) |
|
Size |
370*95*89mm (14.57*3.74*3.5in) |
370*95*122mm
(14.57*3.74*4.8in) |
370*95*138mm (14.57*3.74*5.43in) |
370*95*89mm (14.57*3.74*3.5in)
|
|
Nominal Voltage |
48V 15Ah |
48V 20Ah |
52V 20Ah |
36V 10Ah |
|
Base In Plug |
4-PINS |
4-PINS |
4-PINS |
5-PINS |
|
For motor |
48V 0~1800w |
48V 0~1800w |
48V 0~2000w |
36V 0~1000w |
|
Watt Hours |
720Wh(Power:45-60KM) |
960Wh(Power:60-80KM) |
1040Wh(Power:60-90KM) |
360Wh(Power:30-40KM) |
|
Cell |
A-grade 18650 |
A-grade 18650 |
A-grade 18650 |
A-grade 18650 |
|
Weight |
5.8 kg(12.79lbs) |
6.8 kg(14.99lbs) |
6.3kg(13.89lbs) |
3.75 kg(8.27lbs) |
|
With Charger |
54.6V 2A |
54.6V 2A |
58.8V 5A |
42V2A |
|
Discharge Connector |
XT60 |
XT60 |
XT60 |
XT60 |
|
BMS |
40A(BMS) |
40A(BMS) |
40A(BMS) |
30A(BMS) |
|
Size |
370*95*122mm (14.57*3.74*4.8in) |
370 x 95 x 138mm (14.57 x 3.74 x 5.43in) |
370 x 95 x 138mm (14.57 x 3.74 x 5.43in) |
370*95*89mm (14.57*3.74*3.5in) |
|
Nominal Voltage |
36V 15Ah |
36V 20Ah |
48V 10Ah |
48V 15Ah |
|
Base In Plug |
5-PINS |
5-PINS |
5-PINS |
5-PINS |
|
For motor |
36V 0~1500w |
36V 0~1500w |
48V 0~1500w |
48V 0~1800w |
|
Watt Hours |
540Wh(Power:45-60KM) |
720Wh(Power:50-80KM) |
480Wh(Power:45-50KM) |
720Wh(Power:45-60KM) |
|
Cell |
A-grade 18650 |
A-grade 18650 |
A-grade 18650 |
A-grade 18650 |
|
Weight |
4.9 kg(10.8lbs) |
5.5 kg(12.13lbs) |
4.4 kg(9.7lbs) |
5.8 kg(12.79lbs) |
|
With Charger |
42V2A |
42V 2A |
54.6V2A |
54.6V 2A |
|
Discharge Connector |
XT60 |
XT60 |
XT60 |
XT60 |
|
BMS |
40A(BMS) |
40A(BMS) |
30A(BMS) |
40A(BMS) |
|
Size |
370*95*122mm (14.57*3.74*4.8in)
|
370*95*138mm (14.57*3.74*5.43in) |
370*95*89mm
(14.57*3.74*3.5inch)
|
370*95*122mm (14.57*3.74*4.8in) |
|
Nominal Voltage |
48V 20Ah |
52V 20Ah |
|
Base In Plug |
5-PINS |
5-PINS |
|
For motor |
48V 0~1800w |
48V 0~2000w |
|
Watt Hours |
960Wh(Power:60-80KM) |
1040Wh(Power:60-90KM) |
|
Cell |
A-grade 18650 |
A-grade 18650 |
|
Weight |
6.8 kg(14.99lbs) |
6.3kg(13.89lbs) |
|
With Charger |
54.6V 2A |
58.8V 5A |
|
Discharge Connector |
XT60 |
XT60 |
|
BMS |
40A(BMS) |
40A(BMS) |
|
Size |
370 x 95 x 138mm (14.57 x 3.74 x 5.43in) |
370 x 95 x 138mm (14.57 x 3.74 x 5.43in) |





The Charger is UL 62368-1 certified and can provide documentation showing certification on request.
The Battery is UL 2849 and UL 2272 certified and can provide documentation showing certification on request.
The creepage distance and electrical gap distance in the charger are sufficient; the product does not pose a fire risk and will not cause
components to overheat or explode, and the output has a fuse to protect the battery pack from overcurrent conditions.
Battery charging input and output cables are also adequately protected against stress.
The plug meets the size requirements of the relevant standards, and there is no risk of electric shock to the user. The fuse complies with
relevant standards and does not pose a risk of fire or explosion in the event of failure. The product has been marked and labeled in
accordance with the standards



Share
